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                [Usaco2011 Feb]Generic Cow Protests                 </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><p><span style="font-size: medium"><br />
Farmer John's N (1 &lt;= N &lt;= 100,000) cows are lined up in a row and<br />
numbered 1..N. The cows are conducting another one of their strange<br />
protests, so each cow i is holding up a sign with an integer A_i<br />
(-10,000 &lt;= A_i &lt;= 10,000).<br />
<br />
FJ knows the mob of cows will behave if they are properly grouped<br />
and thus would like to arrange the cows into one or more contiguous<br />
groups so that every cow is in exactly one group and that every<br />
group has a nonnegative sum.<br />
<br />
Help him count the number of ways he can do this, modulo 1,000,000,009.<br />
<br />
By way of example, if N = 4 and the cows' signs are 2, 3, -3, and<br />
1, then the following are the only four valid ways of arranging the<br />
cows:<br />
<br />
(2 3 -3 1)<br />
(2 3 -3) (1)<br />
(2) (3 -3 1)<br />
(2) (3 -3) (1)<br />
<br />
Note that this example demonstrates the rule for counting different<br />
orders of the arrangements.<br />
<br />
给出n个数，问有几种划分方案（不能改变数的位置），使得每组中数的和大于等于0。输出方案数除以 1000000009的余数。<br />
</span></p></p><hr/><h3>输入格式</h3><p><p><span style="font-size: medium">* Line 1: A single integer: N<br />
<br />
* Lines 2..N + 1: Line i + 1 contains a single integer: A_i<br />
<br />
</span></p></p><hr/><h3>输出格式</h3><p><p><span style="font-size: medium"><br />
* Line 1: A single integer, the number of arrangements modulo<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1,000,000,009.<br />
</span></p></p><hr/><h3>样例输入</h3><pre>4
2
3
-3
1


</pre><hr/><h3>样例输出</h3><pre>4
</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>Gold</p>
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